Impact of a porous structure in mitigating wave effect on a floating elastic plate in a two-layer fluid

Abstract

The interaction of oblique waves with a porous structure placed in front of a floating elastic plate, which is an idealization of a very large floating structure in a two-layer fluid, is examined in the context of linear water wave theory. The porous structure, treated as a breakwater, is placed at a finite distance from the floating elastic plate to mitigate the hydrodynamic response of the elastic plate. To address the associated boundary value problem, matched eigenfunction expansion method is employed. The solution is computed, and the impact of the porous structure on the hydrodynamic coefficients associated with the floating plate such as deflection of the plate, bending moment, shear force, mooring line effect, wave scattering and trapping is graphically illustrated. The suitable physical properties for ideal plate characteristics are shown by a comparison of various edge conditions. It is recommended that an appropriate breakwater width maximizes wave reflection and minimizes transmission. Waveload on the plate gets reduced by appropriate parameter values connected with the porous breakwater. The findings of this study are expected to have an effect on how marine infrastructures are to be designed to mitigate wave force.